Kconfig 43 KB

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  1. #
  2. # For a description of the syntax of this configuration file,
  3. # see Documentation/kbuild/kconfig-language.txt.
  4. #
  5. mainmenu "Linux Kernel Configuration"
  6. config ARM
  7. bool
  8. default y
  9. select HAVE_AOUT
  10. select HAVE_IDE
  11. select RTC_LIB
  12. select SYS_SUPPORTS_APM_EMULATION
  13. select GENERIC_ATOMIC64 if (!CPU_32v6K)
  14. select HAVE_OPROFILE
  15. select HAVE_ARCH_KGDB
  16. select HAVE_KPROBES if (!XIP_KERNEL)
  17. select HAVE_KRETPROBES if (HAVE_KPROBES)
  18. select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
  19. select HAVE_GENERIC_DMA_COHERENT
  20. select HAVE_KERNEL_GZIP
  21. select HAVE_KERNEL_LZO
  22. select HAVE_PERF_EVENTS
  23. select PERF_USE_VMALLOC
  24. help
  25. The ARM series is a line of low-power-consumption RISC chip designs
  26. licensed by ARM Ltd and targeted at embedded applications and
  27. handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
  28. manufactured, but legacy ARM-based PC hardware remains popular in
  29. Europe. There is an ARM Linux project with a web page at
  30. <http://www.arm.linux.org.uk/>.
  31. config HAVE_PWM
  32. bool
  33. config SYS_SUPPORTS_APM_EMULATION
  34. bool
  35. config GENERIC_GPIO
  36. bool
  37. config GENERIC_TIME
  38. bool
  39. config GENERIC_CLOCKEVENTS
  40. bool
  41. config GENERIC_CLOCKEVENTS_BROADCAST
  42. bool
  43. depends on GENERIC_CLOCKEVENTS
  44. default y if SMP && !LOCAL_TIMERS
  45. config HAVE_TCM
  46. bool
  47. select GENERIC_ALLOCATOR
  48. config HAVE_PROC_CPU
  49. bool
  50. config NO_IOPORT
  51. bool
  52. config EISA
  53. bool
  54. ---help---
  55. The Extended Industry Standard Architecture (EISA) bus was
  56. developed as an open alternative to the IBM MicroChannel bus.
  57. The EISA bus provided some of the features of the IBM MicroChannel
  58. bus while maintaining backward compatibility with cards made for
  59. the older ISA bus. The EISA bus saw limited use between 1988 and
  60. 1995 when it was made obsolete by the PCI bus.
  61. Say Y here if you are building a kernel for an EISA-based machine.
  62. Otherwise, say N.
  63. config SBUS
  64. bool
  65. config MCA
  66. bool
  67. help
  68. MicroChannel Architecture is found in some IBM PS/2 machines and
  69. laptops. It is a bus system similar to PCI or ISA. See
  70. <file:Documentation/mca.txt> (and especially the web page given
  71. there) before attempting to build an MCA bus kernel.
  72. config GENERIC_HARDIRQS
  73. bool
  74. default y
  75. config STACKTRACE_SUPPORT
  76. bool
  77. default y
  78. config HAVE_LATENCYTOP_SUPPORT
  79. bool
  80. depends on !SMP
  81. default y
  82. config LOCKDEP_SUPPORT
  83. bool
  84. default y
  85. config TRACE_IRQFLAGS_SUPPORT
  86. bool
  87. default y
  88. config HARDIRQS_SW_RESEND
  89. bool
  90. default y
  91. config GENERIC_IRQ_PROBE
  92. bool
  93. default y
  94. config GENERIC_LOCKBREAK
  95. bool
  96. default y
  97. depends on SMP && PREEMPT
  98. config RWSEM_GENERIC_SPINLOCK
  99. bool
  100. default y
  101. config RWSEM_XCHGADD_ALGORITHM
  102. bool
  103. config ARCH_HAS_ILOG2_U32
  104. bool
  105. config ARCH_HAS_ILOG2_U64
  106. bool
  107. config ARCH_HAS_CPUFREQ
  108. bool
  109. help
  110. Internal node to signify that the ARCH has CPUFREQ support
  111. and that the relevant menu configurations are displayed for
  112. it.
  113. config GENERIC_HWEIGHT
  114. bool
  115. default y
  116. config GENERIC_CALIBRATE_DELAY
  117. bool
  118. default y
  119. config ARCH_MAY_HAVE_PC_FDC
  120. bool
  121. config ZONE_DMA
  122. bool
  123. config NEED_DMA_MAP_STATE
  124. def_bool y
  125. config GENERIC_ISA_DMA
  126. bool
  127. config FIQ
  128. bool
  129. config ARCH_MTD_XIP
  130. bool
  131. config GENERIC_HARDIRQS_NO__DO_IRQ
  132. def_bool y
  133. config ARM_L1_CACHE_SHIFT_6
  134. bool
  135. help
  136. Setting ARM L1 cache line size to 64 Bytes.
  137. if OPROFILE
  138. config OPROFILE_ARMV6
  139. def_bool y
  140. depends on CPU_V6 && !SMP
  141. select OPROFILE_ARM11_CORE
  142. config OPROFILE_MPCORE
  143. def_bool y
  144. depends on CPU_V6 && SMP
  145. select OPROFILE_ARM11_CORE
  146. config OPROFILE_ARM11_CORE
  147. bool
  148. config OPROFILE_ARMV7
  149. def_bool y
  150. depends on CPU_V7 && !SMP
  151. bool
  152. endif
  153. config VECTORS_BASE
  154. hex
  155. default 0xffff0000 if MMU || CPU_HIGH_VECTOR
  156. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  157. default 0x00000000
  158. help
  159. The base address of exception vectors.
  160. source "init/Kconfig"
  161. source "kernel/Kconfig.freezer"
  162. menu "System Type"
  163. config MMU
  164. bool "MMU-based Paged Memory Management Support"
  165. default y
  166. help
  167. Select if you want MMU-based virtualised addressing space
  168. support by paged memory management. If unsure, say 'Y'.
  169. #
  170. # The "ARM system type" choice list is ordered alphabetically by option
  171. # text. Please add new entries in the option alphabetic order.
  172. #
  173. choice
  174. prompt "ARM system type"
  175. default ARCH_VERSATILE
  176. config ARCH_AAEC2000
  177. bool "Agilent AAEC-2000 based"
  178. select CPU_ARM920T
  179. select ARM_AMBA
  180. select HAVE_CLK
  181. help
  182. This enables support for systems based on the Agilent AAEC-2000
  183. config ARCH_INTEGRATOR
  184. bool "ARM Ltd. Integrator family"
  185. select ARM_AMBA
  186. select ARCH_HAS_CPUFREQ
  187. select HAVE_CLK
  188. select COMMON_CLKDEV
  189. select ICST525
  190. help
  191. Support for ARM's Integrator platform.
  192. config ARCH_REALVIEW
  193. bool "ARM Ltd. RealView family"
  194. select ARM_AMBA
  195. select HAVE_CLK
  196. select COMMON_CLKDEV
  197. select ICST307
  198. select GENERIC_TIME
  199. select GENERIC_CLOCKEVENTS
  200. select ARCH_WANT_OPTIONAL_GPIOLIB
  201. select GPIO_PL061 if GPIOLIB
  202. help
  203. This enables support for ARM Ltd RealView boards.
  204. config ARCH_VERSATILE
  205. bool "ARM Ltd. Versatile family"
  206. select ARM_AMBA
  207. select ARM_VIC
  208. select HAVE_CLK
  209. select COMMON_CLKDEV
  210. select ICST307
  211. select GENERIC_TIME
  212. select GENERIC_CLOCKEVENTS
  213. select ARCH_WANT_OPTIONAL_GPIOLIB
  214. help
  215. This enables support for ARM Ltd Versatile board.
  216. config ARCH_AT91
  217. bool "Atmel AT91"
  218. select GENERIC_GPIO
  219. select ARCH_REQUIRE_GPIOLIB
  220. select HAVE_CLK
  221. help
  222. This enables support for systems based on the Atmel AT91RM9200,
  223. AT91SAM9 and AT91CAP9 processors.
  224. config ARCH_BCMRING
  225. bool "Broadcom BCMRING"
  226. depends on MMU
  227. select CPU_V6
  228. select ARM_AMBA
  229. select COMMON_CLKDEV
  230. select GENERIC_TIME
  231. select GENERIC_CLOCKEVENTS
  232. select ARCH_WANT_OPTIONAL_GPIOLIB
  233. help
  234. Support for Broadcom's BCMRing platform.
  235. config ARCH_CLPS711X
  236. bool "Cirrus Logic CLPS711x/EP721x-based"
  237. select CPU_ARM720T
  238. help
  239. Support for Cirrus Logic 711x/721x based boards.
  240. config ARCH_GEMINI
  241. bool "Cortina Systems Gemini"
  242. select CPU_FA526
  243. select GENERIC_GPIO
  244. select ARCH_REQUIRE_GPIOLIB
  245. help
  246. Support for the Cortina Systems Gemini family SoCs
  247. config ARCH_EBSA110
  248. bool "EBSA-110"
  249. select CPU_SA110
  250. select ISA
  251. select NO_IOPORT
  252. help
  253. This is an evaluation board for the StrongARM processor available
  254. from Digital. It has limited hardware on-board, including an
  255. Ethernet interface, two PCMCIA sockets, two serial ports and a
  256. parallel port.
  257. config ARCH_EP93XX
  258. bool "EP93xx-based"
  259. select CPU_ARM920T
  260. select ARM_AMBA
  261. select ARM_VIC
  262. select GENERIC_GPIO
  263. select HAVE_CLK
  264. select COMMON_CLKDEV
  265. select ARCH_REQUIRE_GPIOLIB
  266. select ARCH_HAS_HOLES_MEMORYMODEL
  267. help
  268. This enables support for the Cirrus EP93xx series of CPUs.
  269. config ARCH_FOOTBRIDGE
  270. bool "FootBridge"
  271. select CPU_SA110
  272. select FOOTBRIDGE
  273. help
  274. Support for systems based on the DC21285 companion chip
  275. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  276. config ARCH_MXC
  277. bool "Freescale MXC/iMX-based"
  278. select GENERIC_TIME
  279. select GENERIC_CLOCKEVENTS
  280. select ARCH_REQUIRE_GPIOLIB
  281. select HAVE_CLK
  282. select COMMON_CLKDEV
  283. help
  284. Support for Freescale MXC/iMX-based family of processors
  285. config ARCH_STMP3XXX
  286. bool "Freescale STMP3xxx"
  287. select CPU_ARM926T
  288. select HAVE_CLK
  289. select COMMON_CLKDEV
  290. select ARCH_REQUIRE_GPIOLIB
  291. select GENERIC_TIME
  292. select GENERIC_CLOCKEVENTS
  293. select GENERIC_GPIO
  294. select USB_ARCH_HAS_EHCI
  295. help
  296. Support for systems based on the Freescale 3xxx CPUs.
  297. config ARCH_NETX
  298. bool "Hilscher NetX based"
  299. select CPU_ARM926T
  300. select ARM_VIC
  301. select GENERIC_CLOCKEVENTS
  302. select GENERIC_TIME
  303. help
  304. This enables support for systems based on the Hilscher NetX Soc
  305. config ARCH_H720X
  306. bool "Hynix HMS720x-based"
  307. select CPU_ARM720T
  308. select ISA_DMA_API
  309. help
  310. This enables support for systems based on the Hynix HMS720x
  311. config ARCH_IOP13XX
  312. bool "IOP13xx-based"
  313. depends on MMU
  314. select CPU_XSC3
  315. select PLAT_IOP
  316. select PCI
  317. select ARCH_SUPPORTS_MSI
  318. select VMSPLIT_1G
  319. help
  320. Support for Intel's IOP13XX (XScale) family of processors.
  321. config ARCH_IOP32X
  322. bool "IOP32x-based"
  323. depends on MMU
  324. select CPU_XSCALE
  325. select PLAT_IOP
  326. select PCI
  327. select GENERIC_GPIO
  328. select ARCH_REQUIRE_GPIOLIB
  329. help
  330. Support for Intel's 80219 and IOP32X (XScale) family of
  331. processors.
  332. config ARCH_IOP33X
  333. bool "IOP33x-based"
  334. depends on MMU
  335. select CPU_XSCALE
  336. select PLAT_IOP
  337. select PCI
  338. select GENERIC_GPIO
  339. select ARCH_REQUIRE_GPIOLIB
  340. help
  341. Support for Intel's IOP33X (XScale) family of processors.
  342. config ARCH_IXP23XX
  343. bool "IXP23XX-based"
  344. depends on MMU
  345. select CPU_XSC3
  346. select PCI
  347. help
  348. Support for Intel's IXP23xx (XScale) family of processors.
  349. config ARCH_IXP2000
  350. bool "IXP2400/2800-based"
  351. depends on MMU
  352. select CPU_XSCALE
  353. select PCI
  354. help
  355. Support for Intel's IXP2400/2800 (XScale) family of processors.
  356. config ARCH_IXP4XX
  357. bool "IXP4xx-based"
  358. depends on MMU
  359. select CPU_XSCALE
  360. select GENERIC_GPIO
  361. select GENERIC_TIME
  362. select GENERIC_CLOCKEVENTS
  363. select DMABOUNCE if PCI
  364. help
  365. Support for Intel's IXP4XX (XScale) family of processors.
  366. config ARCH_L7200
  367. bool "LinkUp-L7200"
  368. select CPU_ARM720T
  369. select FIQ
  370. help
  371. Say Y here if you intend to run this kernel on a LinkUp Systems
  372. L7200 Software Development Board which uses an ARM720T processor.
  373. Information on this board can be obtained at:
  374. <http://www.linkupsys.com/>
  375. If you have any questions or comments about the Linux kernel port
  376. to this board, send e-mail to <sjhill@cotw.com>.
  377. config ARCH_DOVE
  378. bool "Marvell Dove"
  379. select PCI
  380. select GENERIC_GPIO
  381. select ARCH_REQUIRE_GPIOLIB
  382. select GENERIC_TIME
  383. select GENERIC_CLOCKEVENTS
  384. select PLAT_ORION
  385. help
  386. Support for the Marvell Dove SoC 88AP510
  387. config ARCH_KIRKWOOD
  388. bool "Marvell Kirkwood"
  389. select CPU_FEROCEON
  390. select PCI
  391. select GENERIC_GPIO
  392. select ARCH_REQUIRE_GPIOLIB
  393. select GENERIC_TIME
  394. select GENERIC_CLOCKEVENTS
  395. select PLAT_ORION
  396. help
  397. Support for the following Marvell Kirkwood series SoCs:
  398. 88F6180, 88F6192 and 88F6281.
  399. config ARCH_LOKI
  400. bool "Marvell Loki (88RC8480)"
  401. select CPU_FEROCEON
  402. select GENERIC_TIME
  403. select GENERIC_CLOCKEVENTS
  404. select PLAT_ORION
  405. help
  406. Support for the Marvell Loki (88RC8480) SoC.
  407. config ARCH_MV78XX0
  408. bool "Marvell MV78xx0"
  409. select CPU_FEROCEON
  410. select PCI
  411. select GENERIC_GPIO
  412. select ARCH_REQUIRE_GPIOLIB
  413. select GENERIC_TIME
  414. select GENERIC_CLOCKEVENTS
  415. select PLAT_ORION
  416. help
  417. Support for the following Marvell MV78xx0 series SoCs:
  418. MV781x0, MV782x0.
  419. config ARCH_ORION5X
  420. bool "Marvell Orion"
  421. depends on MMU
  422. select CPU_FEROCEON
  423. select PCI
  424. select GENERIC_GPIO
  425. select ARCH_REQUIRE_GPIOLIB
  426. select GENERIC_TIME
  427. select GENERIC_CLOCKEVENTS
  428. select PLAT_ORION
  429. help
  430. Support for the following Marvell Orion 5x series SoCs:
  431. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  432. Orion-2 (5281), Orion-1-90 (6183).
  433. config ARCH_MMP
  434. bool "Marvell PXA168/910/MMP2"
  435. depends on MMU
  436. select GENERIC_GPIO
  437. select ARCH_REQUIRE_GPIOLIB
  438. select HAVE_CLK
  439. select COMMON_CLKDEV
  440. select GENERIC_TIME
  441. select GENERIC_CLOCKEVENTS
  442. select TICK_ONESHOT
  443. select PLAT_PXA
  444. help
  445. Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
  446. config ARCH_KS8695
  447. bool "Micrel/Kendin KS8695"
  448. select CPU_ARM922T
  449. select GENERIC_GPIO
  450. select ARCH_REQUIRE_GPIOLIB
  451. help
  452. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  453. System-on-Chip devices.
  454. config ARCH_NS9XXX
  455. bool "NetSilicon NS9xxx"
  456. select CPU_ARM926T
  457. select GENERIC_GPIO
  458. select GENERIC_TIME
  459. select GENERIC_CLOCKEVENTS
  460. select HAVE_CLK
  461. help
  462. Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
  463. System.
  464. <http://www.digi.com/products/microprocessors/index.jsp>
  465. config ARCH_W90X900
  466. bool "Nuvoton W90X900 CPU"
  467. select CPU_ARM926T
  468. select ARCH_REQUIRE_GPIOLIB
  469. select GENERIC_GPIO
  470. select HAVE_CLK
  471. select COMMON_CLKDEV
  472. select GENERIC_TIME
  473. select GENERIC_CLOCKEVENTS
  474. help
  475. Support for Nuvoton (Winbond logic dept.) ARM9 processor,
  476. At present, the w90x900 has been renamed nuc900, regarding
  477. the ARM series product line, you can login the following
  478. link address to know more.
  479. <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
  480. ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
  481. config ARCH_NUC93X
  482. bool "Nuvoton NUC93X CPU"
  483. select CPU_ARM926T
  484. select HAVE_CLK
  485. select COMMON_CLKDEV
  486. help
  487. Support for Nuvoton (Winbond logic dept.) NUC93X MCU,The NUC93X is a
  488. low-power and high performance MPEG-4/JPEG multimedia controller chip.
  489. config ARCH_PNX4008
  490. bool "Philips Nexperia PNX4008 Mobile"
  491. select CPU_ARM926T
  492. select HAVE_CLK
  493. select COMMON_CLKDEV
  494. help
  495. This enables support for Philips PNX4008 mobile platform.
  496. config ARCH_PXA
  497. bool "PXA2xx/PXA3xx-based"
  498. depends on MMU
  499. select ARCH_MTD_XIP
  500. select ARCH_HAS_CPUFREQ
  501. select GENERIC_GPIO
  502. select HAVE_CLK
  503. select COMMON_CLKDEV
  504. select ARCH_REQUIRE_GPIOLIB
  505. select GENERIC_TIME
  506. select GENERIC_CLOCKEVENTS
  507. select TICK_ONESHOT
  508. select PLAT_PXA
  509. help
  510. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  511. config ARCH_MSM
  512. bool "Qualcomm MSM"
  513. select CPU_V6
  514. select GENERIC_TIME
  515. select GENERIC_CLOCKEVENTS
  516. help
  517. Support for Qualcomm MSM7K based systems. This runs on the ARM11
  518. apps processor of the MSM7K and depends on a shared memory
  519. interface to the ARM9 modem processor which runs the baseband stack
  520. and controls some vital subsystems (clock and power control, etc).
  521. config ARCH_SHMOBILE
  522. bool "Renesas SH-Mobile"
  523. help
  524. Support for Renesas's SH-Mobile ARM platforms
  525. config ARCH_RPC
  526. bool "RiscPC"
  527. select ARCH_ACORN
  528. select FIQ
  529. select TIMER_ACORN
  530. select ARCH_MAY_HAVE_PC_FDC
  531. select HAVE_PATA_PLATFORM
  532. select ISA_DMA_API
  533. select NO_IOPORT
  534. select ARCH_SPARSEMEM_ENABLE
  535. help
  536. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  537. CD-ROM interface, serial and parallel port, and the floppy drive.
  538. config ARCH_SA1100
  539. bool "SA1100-based"
  540. select CPU_SA1100
  541. select ISA
  542. select ARCH_SPARSEMEM_ENABLE
  543. select ARCH_MTD_XIP
  544. select ARCH_HAS_CPUFREQ
  545. select CPU_FREQ
  546. select GENERIC_GPIO
  547. select GENERIC_TIME
  548. select GENERIC_CLOCKEVENTS
  549. select HAVE_CLK
  550. select TICK_ONESHOT
  551. select ARCH_REQUIRE_GPIOLIB
  552. help
  553. Support for StrongARM 11x0 based boards.
  554. config ARCH_S3C2410
  555. bool "Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443, S3C2450"
  556. select GENERIC_GPIO
  557. select ARCH_HAS_CPUFREQ
  558. select HAVE_CLK
  559. help
  560. Samsung S3C2410X CPU based systems, such as the Simtec Electronics
  561. BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
  562. the Samsung SMDK2410 development board (and derivatives).
  563. Note, the S3C2416 and the S3C2450 are so close that they even share
  564. the same SoC ID code. This means that there is no seperate machine
  565. directory (no arch/arm/mach-s3c2450) as the S3C2416 was first.
  566. config ARCH_S3C64XX
  567. bool "Samsung S3C64XX"
  568. select PLAT_SAMSUNG
  569. select CPU_V6
  570. select GENERIC_GPIO
  571. select ARM_VIC
  572. select HAVE_CLK
  573. select NO_IOPORT
  574. select ARCH_HAS_CPUFREQ
  575. select ARCH_REQUIRE_GPIOLIB
  576. select SAMSUNG_CLKSRC
  577. select SAMSUNG_IRQ_VIC_TIMER
  578. select SAMSUNG_IRQ_UART
  579. select S3C_GPIO_TRACK
  580. select S3C_GPIO_PULL_UPDOWN
  581. select S3C_GPIO_CFG_S3C24XX
  582. select S3C_GPIO_CFG_S3C64XX
  583. select S3C_DEV_NAND
  584. select USB_ARCH_HAS_OHCI
  585. select SAMSUNG_GPIOLIB_4BIT
  586. help
  587. Samsung S3C64XX series based systems
  588. config ARCH_S5P6440
  589. bool "Samsung S5P6440"
  590. select CPU_V6
  591. select GENERIC_GPIO
  592. select HAVE_CLK
  593. help
  594. Samsung S5P6440 CPU based systems
  595. config ARCH_S5P6442
  596. bool "Samsung S5P6442"
  597. select CPU_V6
  598. select GENERIC_GPIO
  599. select HAVE_CLK
  600. help
  601. Samsung S5P6442 CPU based systems
  602. config ARCH_S5PC1XX
  603. bool "Samsung S5PC1XX"
  604. select GENERIC_GPIO
  605. select HAVE_CLK
  606. select CPU_V7
  607. select ARM_L1_CACHE_SHIFT_6
  608. help
  609. Samsung S5PC1XX series based systems
  610. config ARCH_S5PV210
  611. bool "Samsung S5PV210/S5PC110"
  612. select CPU_V7
  613. select GENERIC_GPIO
  614. select HAVE_CLK
  615. select ARM_L1_CACHE_SHIFT_6
  616. help
  617. Samsung S5PV210/S5PC110 series based systems
  618. config ARCH_SHARK
  619. bool "Shark"
  620. select CPU_SA110
  621. select ISA
  622. select ISA_DMA
  623. select ZONE_DMA
  624. select PCI
  625. help
  626. Support for the StrongARM based Digital DNARD machine, also known
  627. as "Shark" (<http://www.shark-linux.de/shark.html>).
  628. config ARCH_LH7A40X
  629. bool "Sharp LH7A40X"
  630. select CPU_ARM922T
  631. select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
  632. select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
  633. help
  634. Say Y here for systems based on one of the Sharp LH7A40X
  635. System on a Chip processors. These CPUs include an ARM922T
  636. core with a wide array of integrated devices for
  637. hand-held and low-power applications.
  638. config ARCH_U300
  639. bool "ST-Ericsson U300 Series"
  640. depends on MMU
  641. select CPU_ARM926T
  642. select HAVE_TCM
  643. select ARM_AMBA
  644. select ARM_VIC
  645. select GENERIC_TIME
  646. select GENERIC_CLOCKEVENTS
  647. select HAVE_CLK
  648. select COMMON_CLKDEV
  649. select GENERIC_GPIO
  650. help
  651. Support for ST-Ericsson U300 series mobile platforms.
  652. config ARCH_U8500
  653. bool "ST-Ericsson U8500 Series"
  654. select CPU_V7
  655. select ARM_AMBA
  656. select GENERIC_TIME
  657. select GENERIC_CLOCKEVENTS
  658. select COMMON_CLKDEV
  659. help
  660. Support for ST-Ericsson's Ux500 architecture
  661. config ARCH_NOMADIK
  662. bool "STMicroelectronics Nomadik"
  663. select ARM_AMBA
  664. select ARM_VIC
  665. select CPU_ARM926T
  666. select HAVE_CLK
  667. select COMMON_CLKDEV
  668. select GENERIC_TIME
  669. select GENERIC_CLOCKEVENTS
  670. select GENERIC_GPIO
  671. select ARCH_REQUIRE_GPIOLIB
  672. help
  673. Support for the Nomadik platform by ST-Ericsson
  674. config ARCH_DAVINCI
  675. bool "TI DaVinci"
  676. select CPU_ARM926T
  677. select GENERIC_TIME
  678. select GENERIC_CLOCKEVENTS
  679. select GENERIC_GPIO
  680. select ARCH_REQUIRE_GPIOLIB
  681. select HAVE_CLK
  682. select ZONE_DMA
  683. select HAVE_IDE
  684. select COMMON_CLKDEV
  685. select GENERIC_ALLOCATOR
  686. select ARCH_HAS_HOLES_MEMORYMODEL
  687. help
  688. Support for TI's DaVinci platform.
  689. config ARCH_OMAP
  690. bool "TI OMAP"
  691. select GENERIC_GPIO
  692. select HAVE_CLK
  693. select ARCH_REQUIRE_GPIOLIB
  694. select ARCH_HAS_CPUFREQ
  695. select GENERIC_TIME
  696. select GENERIC_CLOCKEVENTS
  697. select ARCH_HAS_HOLES_MEMORYMODEL
  698. help
  699. Support for TI's OMAP platform (OMAP1 and OMAP2).
  700. endchoice
  701. #
  702. # This is sorted alphabetically by mach-* pathname. However, plat-*
  703. # Kconfigs may be included either alphabetically (according to the
  704. # plat- suffix) or along side the corresponding mach-* source.
  705. #
  706. source "arch/arm/mach-aaec2000/Kconfig"
  707. source "arch/arm/mach-at91/Kconfig"
  708. source "arch/arm/mach-bcmring/Kconfig"
  709. source "arch/arm/mach-clps711x/Kconfig"
  710. source "arch/arm/mach-davinci/Kconfig"
  711. source "arch/arm/mach-dove/Kconfig"
  712. source "arch/arm/mach-ep93xx/Kconfig"
  713. source "arch/arm/mach-footbridge/Kconfig"
  714. source "arch/arm/mach-gemini/Kconfig"
  715. source "arch/arm/mach-h720x/Kconfig"
  716. source "arch/arm/mach-integrator/Kconfig"
  717. source "arch/arm/mach-iop32x/Kconfig"
  718. source "arch/arm/mach-iop33x/Kconfig"
  719. source "arch/arm/mach-iop13xx/Kconfig"
  720. source "arch/arm/mach-ixp4xx/Kconfig"
  721. source "arch/arm/mach-ixp2000/Kconfig"
  722. source "arch/arm/mach-ixp23xx/Kconfig"
  723. source "arch/arm/mach-kirkwood/Kconfig"
  724. source "arch/arm/mach-ks8695/Kconfig"
  725. source "arch/arm/mach-lh7a40x/Kconfig"
  726. source "arch/arm/mach-loki/Kconfig"
  727. source "arch/arm/mach-msm/Kconfig"
  728. source "arch/arm/mach-mv78xx0/Kconfig"
  729. source "arch/arm/plat-mxc/Kconfig"
  730. source "arch/arm/mach-netx/Kconfig"
  731. source "arch/arm/mach-nomadik/Kconfig"
  732. source "arch/arm/plat-nomadik/Kconfig"
  733. source "arch/arm/mach-ns9xxx/Kconfig"
  734. source "arch/arm/mach-nuc93x/Kconfig"
  735. source "arch/arm/plat-omap/Kconfig"
  736. source "arch/arm/mach-omap1/Kconfig"
  737. source "arch/arm/mach-omap2/Kconfig"
  738. source "arch/arm/mach-orion5x/Kconfig"
  739. source "arch/arm/mach-pxa/Kconfig"
  740. source "arch/arm/plat-pxa/Kconfig"
  741. source "arch/arm/mach-mmp/Kconfig"
  742. source "arch/arm/mach-realview/Kconfig"
  743. source "arch/arm/mach-sa1100/Kconfig"
  744. source "arch/arm/plat-samsung/Kconfig"
  745. source "arch/arm/plat-s3c24xx/Kconfig"
  746. source "arch/arm/plat-s5p/Kconfig"
  747. source "arch/arm/plat-s5pc1xx/Kconfig"
  748. if ARCH_S3C2410
  749. source "arch/arm/mach-s3c2400/Kconfig"
  750. source "arch/arm/mach-s3c2410/Kconfig"
  751. source "arch/arm/mach-s3c2412/Kconfig"
  752. source "arch/arm/mach-s3c2416/Kconfig"
  753. source "arch/arm/mach-s3c2440/Kconfig"
  754. source "arch/arm/mach-s3c2443/Kconfig"
  755. endif
  756. if ARCH_S3C64XX
  757. source "arch/arm/mach-s3c64xx/Kconfig"
  758. endif
  759. source "arch/arm/mach-s5p6440/Kconfig"
  760. source "arch/arm/mach-s5p6442/Kconfig"
  761. if ARCH_S5PC1XX
  762. source "arch/arm/mach-s5pc100/Kconfig"
  763. endif
  764. source "arch/arm/mach-s5pv210/Kconfig"
  765. source "arch/arm/mach-shmobile/Kconfig"
  766. source "arch/arm/plat-stmp3xxx/Kconfig"
  767. source "arch/arm/mach-u300/Kconfig"
  768. source "arch/arm/mach-ux500/Kconfig"
  769. source "arch/arm/mach-versatile/Kconfig"
  770. source "arch/arm/mach-w90x900/Kconfig"
  771. # Definitions to make life easier
  772. config ARCH_ACORN
  773. bool
  774. config PLAT_IOP
  775. bool
  776. select GENERIC_CLOCKEVENTS
  777. select GENERIC_TIME
  778. config PLAT_ORION
  779. bool
  780. config PLAT_PXA
  781. bool
  782. source arch/arm/mm/Kconfig
  783. config IWMMXT
  784. bool "Enable iWMMXt support"
  785. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
  786. default y if PXA27x || PXA3xx || ARCH_MMP
  787. help
  788. Enable support for iWMMXt context switching at run time if
  789. running on a CPU that supports it.
  790. # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
  791. config XSCALE_PMU
  792. bool
  793. depends on CPU_XSCALE && !XSCALE_PMU_TIMER
  794. default y
  795. config CPU_HAS_PMU
  796. depends on CPU_V6 || CPU_V7 || XSCALE_PMU
  797. default y
  798. bool
  799. if !MMU
  800. source "arch/arm/Kconfig-nommu"
  801. endif
  802. config ARM_ERRATA_411920
  803. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  804. depends on CPU_V6 && !SMP
  805. help
  806. Invalidation of the Instruction Cache operation can
  807. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  808. It does not affect the MPCore. This option enables the ARM Ltd.
  809. recommended workaround.
  810. config ARM_ERRATA_430973
  811. bool "ARM errata: Stale prediction on replaced interworking branch"
  812. depends on CPU_V7
  813. help
  814. This option enables the workaround for the 430973 Cortex-A8
  815. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  816. interworking branch is replaced with another code sequence at the
  817. same virtual address, whether due to self-modifying code or virtual
  818. to physical address re-mapping, Cortex-A8 does not recover from the
  819. stale interworking branch prediction. This results in Cortex-A8
  820. executing the new code sequence in the incorrect ARM or Thumb state.
  821. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  822. and also flushes the branch target cache at every context switch.
  823. Note that setting specific bits in the ACTLR register may not be
  824. available in non-secure mode.
  825. config ARM_ERRATA_458693
  826. bool "ARM errata: Processor deadlock when a false hazard is created"
  827. depends on CPU_V7
  828. help
  829. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  830. erratum. For very specific sequences of memory operations, it is
  831. possible for a hazard condition intended for a cache line to instead
  832. be incorrectly associated with a different cache line. This false
  833. hazard might then cause a processor deadlock. The workaround enables
  834. the L1 caching of the NEON accesses and disables the PLD instruction
  835. in the ACTLR register. Note that setting specific bits in the ACTLR
  836. register may not be available in non-secure mode.
  837. config ARM_ERRATA_460075
  838. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  839. depends on CPU_V7
  840. help
  841. This option enables the workaround for the 460075 Cortex-A8 (r2p0)
  842. erratum. Any asynchronous access to the L2 cache may encounter a
  843. situation in which recent store transactions to the L2 cache are lost
  844. and overwritten with stale memory contents from external memory. The
  845. workaround disables the write-allocate mode for the L2 cache via the
  846. ACTLR register. Note that setting specific bits in the ACTLR register
  847. may not be available in non-secure mode.
  848. config PL310_ERRATA_588369
  849. bool "Clean & Invalidate maintenance operations do not invalidate clean lines"
  850. depends on CACHE_L2X0 && ARCH_OMAP4
  851. help
  852. The PL310 L2 cache controller implements three types of Clean &
  853. Invalidate maintenance operations: by Physical Address
  854. (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
  855. They are architecturally defined to behave as the execution of a
  856. clean operation followed immediately by an invalidate operation,
  857. both performing to the same memory location. This functionality
  858. is not correctly implemented in PL310 as clean lines are not
  859. invalidated as a result of these operations. Note that this errata
  860. uses Texas Instrument's secure monitor api.
  861. endmenu
  862. source "arch/arm/common/Kconfig"
  863. config FORCE_MAX_ZONEORDER
  864. int
  865. depends on SA1111
  866. default "9"
  867. menu "Bus support"
  868. config ARM_AMBA
  869. bool
  870. config ISA
  871. bool
  872. help
  873. Find out whether you have ISA slots on your motherboard. ISA is the
  874. name of a bus system, i.e. the way the CPU talks to the other stuff
  875. inside your box. Other bus systems are PCI, EISA, MicroChannel
  876. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  877. newer boards don't support it. If you have ISA, say Y, otherwise N.
  878. # Select ISA DMA controller support
  879. config ISA_DMA
  880. bool
  881. select ISA_DMA_API
  882. # Select ISA DMA interface
  883. config ISA_DMA_API
  884. bool
  885. config PCI
  886. bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
  887. help
  888. Find out whether you have a PCI motherboard. PCI is the name of a
  889. bus system, i.e. the way the CPU talks to the other stuff inside
  890. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  891. VESA. If you have PCI, say Y, otherwise N.
  892. config PCI_SYSCALL
  893. def_bool PCI
  894. # Select the host bridge type
  895. config PCI_HOST_VIA82C505
  896. bool
  897. depends on PCI && ARCH_SHARK
  898. default y
  899. config PCI_HOST_ITE8152
  900. bool
  901. depends on PCI && MACH_ARMCORE
  902. default y
  903. select DMABOUNCE
  904. source "drivers/pci/Kconfig"
  905. source "drivers/pcmcia/Kconfig"
  906. endmenu
  907. menu "Kernel Features"
  908. source "kernel/time/Kconfig"
  909. config SMP
  910. bool "Symmetric Multi-Processing (EXPERIMENTAL)"
  911. depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP ||\
  912. MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || ARCH_U8500)
  913. depends on GENERIC_CLOCKEVENTS
  914. select USE_GENERIC_SMP_HELPERS
  915. select HAVE_ARM_SCU if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500)
  916. help
  917. This enables support for systems with more than one CPU. If you have
  918. a system with only one CPU, like most personal computers, say N. If
  919. you have a system with more than one CPU, say Y.
  920. If you say N here, the kernel will run on single and multiprocessor
  921. machines, but will use only one CPU of a multiprocessor machine. If
  922. you say Y here, the kernel will run on many, but not all, single
  923. processor machines. On a single processor machine, the kernel will
  924. run faster if you say N here.
  925. See also <file:Documentation/i386/IO-APIC.txt>,
  926. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  927. <http://www.linuxdoc.org/docs.html#howto>.
  928. If you don't know what to do here, say N.
  929. config HAVE_ARM_SCU
  930. bool
  931. depends on SMP
  932. help
  933. This option enables support for the ARM system coherency unit
  934. config HAVE_ARM_TWD
  935. bool
  936. depends on SMP
  937. help
  938. This options enables support for the ARM timer and watchdog unit
  939. choice
  940. prompt "Memory split"
  941. default VMSPLIT_3G
  942. help
  943. Select the desired split between kernel and user memory.
  944. If you are not absolutely sure what you are doing, leave this
  945. option alone!
  946. config VMSPLIT_3G
  947. bool "3G/1G user/kernel split"
  948. config VMSPLIT_2G
  949. bool "2G/2G user/kernel split"
  950. config VMSPLIT_1G
  951. bool "1G/3G user/kernel split"
  952. endchoice
  953. config PAGE_OFFSET
  954. hex
  955. default 0x40000000 if VMSPLIT_1G
  956. default 0x80000000 if VMSPLIT_2G
  957. default 0xC0000000
  958. config NR_CPUS
  959. int "Maximum number of CPUs (2-32)"
  960. range 2 32
  961. depends on SMP
  962. default "4"
  963. config HOTPLUG_CPU
  964. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  965. depends on SMP && HOTPLUG && EXPERIMENTAL
  966. help
  967. Say Y here to experiment with turning CPUs off and on. CPUs
  968. can be controlled through /sys/devices/system/cpu.
  969. config LOCAL_TIMERS
  970. bool "Use local timer interrupts"
  971. depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || \
  972. REALVIEW_EB_A9MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || ARCH_U8500)
  973. default y
  974. select HAVE_ARM_TWD if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500)
  975. help
  976. Enable support for local timers on SMP platforms, rather then the
  977. legacy IPI broadcast method. Local timers allows the system
  978. accounting to be spread across the timer interval, preventing a
  979. "thundering herd" at every timer tick.
  980. source kernel/Kconfig.preempt
  981. config HZ
  982. int
  983. default 128 if ARCH_L7200
  984. default 200 if ARCH_EBSA110 || ARCH_S3C2410 || ARCH_S5P6440 || ARCH_S5P6442 || ARCH_S5PV210
  985. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  986. default AT91_TIMER_HZ if ARCH_AT91
  987. default 100
  988. config THUMB2_KERNEL
  989. bool "Compile the kernel in Thumb-2 mode"
  990. depends on CPU_V7 && EXPERIMENTAL
  991. select AEABI
  992. select ARM_ASM_UNIFIED
  993. help
  994. By enabling this option, the kernel will be compiled in
  995. Thumb-2 mode. A compiler/assembler that understand the unified
  996. ARM-Thumb syntax is needed.
  997. If unsure, say N.
  998. config ARM_ASM_UNIFIED
  999. bool
  1000. config AEABI
  1001. bool "Use the ARM EABI to compile the kernel"
  1002. help
  1003. This option allows for the kernel to be compiled using the latest
  1004. ARM ABI (aka EABI). This is only useful if you are using a user
  1005. space environment that is also compiled with EABI.
  1006. Since there are major incompatibilities between the legacy ABI and
  1007. EABI, especially with regard to structure member alignment, this
  1008. option also changes the kernel syscall calling convention to
  1009. disambiguate both ABIs and allow for backward compatibility support
  1010. (selected with CONFIG_OABI_COMPAT).
  1011. To use this you need GCC version 4.0.0 or later.
  1012. config OABI_COMPAT
  1013. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  1014. depends on AEABI && EXPERIMENTAL
  1015. default y
  1016. help
  1017. This option preserves the old syscall interface along with the
  1018. new (ARM EABI) one. It also provides a compatibility layer to
  1019. intercept syscalls that have structure arguments which layout
  1020. in memory differs between the legacy ABI and the new ARM EABI
  1021. (only for non "thumb" binaries). This option adds a tiny
  1022. overhead to all syscalls and produces a slightly larger kernel.
  1023. If you know you'll be using only pure EABI user space then you
  1024. can say N here. If this option is not selected and you attempt
  1025. to execute a legacy ABI binary then the result will be
  1026. UNPREDICTABLE (in fact it can be predicted that it won't work
  1027. at all). If in doubt say Y.
  1028. config ARCH_HAS_HOLES_MEMORYMODEL
  1029. bool
  1030. # Discontigmem is deprecated
  1031. config ARCH_DISCONTIGMEM_ENABLE
  1032. bool
  1033. config ARCH_SPARSEMEM_ENABLE
  1034. bool
  1035. config ARCH_SPARSEMEM_DEFAULT
  1036. def_bool ARCH_SPARSEMEM_ENABLE
  1037. config ARCH_SELECT_MEMORY_MODEL
  1038. def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
  1039. config NODES_SHIFT
  1040. int
  1041. default "4" if ARCH_LH7A40X
  1042. default "2"
  1043. depends on NEED_MULTIPLE_NODES
  1044. config HIGHMEM
  1045. bool "High Memory Support (EXPERIMENTAL)"
  1046. depends on MMU && EXPERIMENTAL
  1047. help
  1048. The address space of ARM processors is only 4 Gigabytes large
  1049. and it has to accommodate user address space, kernel address
  1050. space as well as some memory mapped IO. That means that, if you
  1051. have a large amount of physical memory and/or IO, not all of the
  1052. memory can be "permanently mapped" by the kernel. The physical
  1053. memory that is not permanently mapped is called "high memory".
  1054. Depending on the selected kernel/user memory split, minimum
  1055. vmalloc space and actual amount of RAM, you may not need this
  1056. option which should result in a slightly faster kernel.
  1057. If unsure, say n.
  1058. config HIGHPTE
  1059. bool "Allocate 2nd-level pagetables from highmem"
  1060. depends on HIGHMEM
  1061. depends on !OUTER_CACHE
  1062. config HW_PERF_EVENTS
  1063. bool "Enable hardware performance counter support for perf events"
  1064. depends on PERF_EVENTS && CPU_HAS_PMU && (CPU_V6 || CPU_V7)
  1065. default y
  1066. help
  1067. Enable hardware performance counter support for perf events. If
  1068. disabled, perf events will use software events only.
  1069. source "mm/Kconfig"
  1070. config LEDS
  1071. bool "Timer and CPU usage LEDs"
  1072. depends on ARCH_CDB89712 || ARCH_EBSA110 || \
  1073. ARCH_EBSA285 || ARCH_INTEGRATOR || \
  1074. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  1075. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  1076. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  1077. ARCH_AT91 || ARCH_DAVINCI || \
  1078. ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
  1079. help
  1080. If you say Y here, the LEDs on your machine will be used
  1081. to provide useful information about your current system status.
  1082. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  1083. be able to select which LEDs are active using the options below. If
  1084. you are compiling a kernel for the EBSA-110 or the LART however, the
  1085. red LED will simply flash regularly to indicate that the system is
  1086. still functional. It is safe to say Y here if you have a CATS
  1087. system, but the driver will do nothing.
  1088. config LEDS_TIMER
  1089. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  1090. OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1091. || MACH_OMAP_PERSEUS2
  1092. depends on LEDS
  1093. depends on !GENERIC_CLOCKEVENTS
  1094. default y if ARCH_EBSA110
  1095. help
  1096. If you say Y here, one of the system LEDs (the green one on the
  1097. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  1098. will flash regularly to indicate that the system is still
  1099. operational. This is mainly useful to kernel hackers who are
  1100. debugging unstable kernels.
  1101. The LART uses the same LED for both Timer LED and CPU usage LED
  1102. functions. You may choose to use both, but the Timer LED function
  1103. will overrule the CPU usage LED.
  1104. config LEDS_CPU
  1105. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  1106. !ARCH_OMAP) \
  1107. || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1108. || MACH_OMAP_PERSEUS2
  1109. depends on LEDS
  1110. help
  1111. If you say Y here, the red LED will be used to give a good real
  1112. time indication of CPU usage, by lighting whenever the idle task
  1113. is not currently executing.
  1114. The LART uses the same LED for both Timer LED and CPU usage LED
  1115. functions. You may choose to use both, but the Timer LED function
  1116. will overrule the CPU usage LED.
  1117. config ALIGNMENT_TRAP
  1118. bool
  1119. depends on CPU_CP15_MMU
  1120. default y if !ARCH_EBSA110
  1121. select HAVE_PROC_CPU if PROC_FS
  1122. help
  1123. ARM processors cannot fetch/store information which is not
  1124. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1125. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1126. fetch/store instructions will be emulated in software if you say
  1127. here, which has a severe performance impact. This is necessary for
  1128. correct operation of some network protocols. With an IP-only
  1129. configuration it is safe to say N, otherwise say Y.
  1130. config UACCESS_WITH_MEMCPY
  1131. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
  1132. depends on MMU && EXPERIMENTAL
  1133. default y if CPU_FEROCEON
  1134. help
  1135. Implement faster copy_to_user and clear_user methods for CPU
  1136. cores where a 8-word STM instruction give significantly higher
  1137. memory write throughput than a sequence of individual 32bit stores.
  1138. A possible side effect is a slight increase in scheduling latency
  1139. between threads sharing the same address space if they invoke
  1140. such copy operations with large buffers.
  1141. However, if the CPU data cache is using a write-allocate mode,
  1142. this option is unlikely to provide any performance gain.
  1143. endmenu
  1144. menu "Boot options"
  1145. # Compressed boot loader in ROM. Yes, we really want to ask about
  1146. # TEXT and BSS so we preserve their values in the config files.
  1147. config ZBOOT_ROM_TEXT
  1148. hex "Compressed ROM boot loader base address"
  1149. default "0"
  1150. help
  1151. The physical address at which the ROM-able zImage is to be
  1152. placed in the target. Platforms which normally make use of
  1153. ROM-able zImage formats normally set this to a suitable
  1154. value in their defconfig file.
  1155. If ZBOOT_ROM is not enabled, this has no effect.
  1156. config ZBOOT_ROM_BSS
  1157. hex "Compressed ROM boot loader BSS address"
  1158. default "0"
  1159. help
  1160. The base address of an area of read/write memory in the target
  1161. for the ROM-able zImage which must be available while the
  1162. decompressor is running. It must be large enough to hold the
  1163. entire decompressed kernel plus an additional 128 KiB.
  1164. Platforms which normally make use of ROM-able zImage formats
  1165. normally set this to a suitable value in their defconfig file.
  1166. If ZBOOT_ROM is not enabled, this has no effect.
  1167. config ZBOOT_ROM
  1168. bool "Compressed boot loader in ROM/flash"
  1169. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1170. help
  1171. Say Y here if you intend to execute your compressed kernel image
  1172. (zImage) directly from ROM or flash. If unsure, say N.
  1173. config CMDLINE
  1174. string "Default kernel command string"
  1175. default ""
  1176. help
  1177. On some architectures (EBSA110 and CATS), there is currently no way
  1178. for the boot loader to pass arguments to the kernel. For these
  1179. architectures, you should supply some command-line options at build
  1180. time by entering them here. As a minimum, you should specify the
  1181. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1182. config XIP_KERNEL
  1183. bool "Kernel Execute-In-Place from ROM"
  1184. depends on !ZBOOT_ROM
  1185. help
  1186. Execute-In-Place allows the kernel to run from non-volatile storage
  1187. directly addressable by the CPU, such as NOR flash. This saves RAM
  1188. space since the text section of the kernel is not loaded from flash
  1189. to RAM. Read-write sections, such as the data section and stack,
  1190. are still copied to RAM. The XIP kernel is not compressed since
  1191. it has to run directly from flash, so it will take more space to
  1192. store it. The flash address used to link the kernel object files,
  1193. and for storing it, is configuration dependent. Therefore, if you
  1194. say Y here, you must know the proper physical address where to
  1195. store the kernel image depending on your own flash memory usage.
  1196. Also note that the make target becomes "make xipImage" rather than
  1197. "make zImage" or "make Image". The final kernel binary to put in
  1198. ROM memory will be arch/arm/boot/xipImage.
  1199. If unsure, say N.
  1200. config XIP_PHYS_ADDR
  1201. hex "XIP Kernel Physical Location"
  1202. depends on XIP_KERNEL
  1203. default "0x00080000"
  1204. help
  1205. This is the physical address in your flash memory the kernel will
  1206. be linked for and stored to. This address is dependent on your
  1207. own flash usage.
  1208. config KEXEC
  1209. bool "Kexec system call (EXPERIMENTAL)"
  1210. depends on EXPERIMENTAL
  1211. help
  1212. kexec is a system call that implements the ability to shutdown your
  1213. current kernel, and to start another kernel. It is like a reboot
  1214. but it is independent of the system firmware. And like a reboot
  1215. you can start any kernel with it, not just Linux.
  1216. It is an ongoing process to be certain the hardware in a machine
  1217. is properly shutdown, so do not be surprised if this code does not
  1218. initially work for you. It may help to enable device hotplugging
  1219. support.
  1220. config ATAGS_PROC
  1221. bool "Export atags in procfs"
  1222. depends on KEXEC
  1223. default y
  1224. help
  1225. Should the atags used to boot the kernel be exported in an "atags"
  1226. file in procfs. Useful with kexec.
  1227. endmenu
  1228. menu "CPU Power Management"
  1229. if ARCH_HAS_CPUFREQ
  1230. source "drivers/cpufreq/Kconfig"
  1231. config CPU_FREQ_SA1100
  1232. bool
  1233. config CPU_FREQ_SA1110
  1234. bool
  1235. config CPU_FREQ_INTEGRATOR
  1236. tristate "CPUfreq driver for ARM Integrator CPUs"
  1237. depends on ARCH_INTEGRATOR && CPU_FREQ
  1238. default y
  1239. help
  1240. This enables the CPUfreq driver for ARM Integrator CPUs.
  1241. For details, take a look at <file:Documentation/cpu-freq>.
  1242. If in doubt, say Y.
  1243. config CPU_FREQ_PXA
  1244. bool
  1245. depends on CPU_FREQ && ARCH_PXA && PXA25x
  1246. default y
  1247. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  1248. config CPU_FREQ_S3C64XX
  1249. bool "CPUfreq support for Samsung S3C64XX CPUs"
  1250. depends on CPU_FREQ && CPU_S3C6410
  1251. config CPU_FREQ_S3C
  1252. bool
  1253. help
  1254. Internal configuration node for common cpufreq on Samsung SoC
  1255. config CPU_FREQ_S3C24XX
  1256. bool "CPUfreq driver for Samsung S3C24XX series CPUs"
  1257. depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
  1258. select CPU_FREQ_S3C
  1259. help
  1260. This enables the CPUfreq driver for the Samsung S3C24XX family
  1261. of CPUs.
  1262. For details, take a look at <file:Documentation/cpu-freq>.
  1263. If in doubt, say N.
  1264. config CPU_FREQ_S3C24XX_PLL
  1265. bool "Support CPUfreq changing of PLL frequency"
  1266. depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
  1267. help
  1268. Compile in support for changing the PLL frequency from the
  1269. S3C24XX series CPUfreq driver. The PLL takes time to settle
  1270. after a frequency change, so by default it is not enabled.
  1271. This also means that the PLL tables for the selected CPU(s) will
  1272. be built which may increase the size of the kernel image.
  1273. config CPU_FREQ_S3C24XX_DEBUG
  1274. bool "Debug CPUfreq Samsung driver core"
  1275. depends on CPU_FREQ_S3C24XX
  1276. help
  1277. Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
  1278. config CPU_FREQ_S3C24XX_IODEBUG
  1279. bool "Debug CPUfreq Samsung driver IO timing"
  1280. depends on CPU_FREQ_S3C24XX
  1281. help
  1282. Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
  1283. config CPU_FREQ_S3C24XX_DEBUGFS
  1284. bool "Export debugfs for CPUFreq"
  1285. depends on CPU_FREQ_S3C24XX && DEBUG_FS
  1286. help
  1287. Export status information via debugfs.
  1288. endif
  1289. source "drivers/cpuidle/Kconfig"
  1290. endmenu
  1291. menu "Floating point emulation"
  1292. comment "At least one emulation must be selected"
  1293. config FPE_NWFPE
  1294. bool "NWFPE math emulation"
  1295. depends on !AEABI || OABI_COMPAT
  1296. ---help---
  1297. Say Y to include the NWFPE floating point emulator in the kernel.
  1298. This is necessary to run most binaries. Linux does not currently
  1299. support floating point hardware so you need to say Y here even if
  1300. your machine has an FPA or floating point co-processor podule.
  1301. You may say N here if you are going to load the Acorn FPEmulator
  1302. early in the bootup.
  1303. config FPE_NWFPE_XP
  1304. bool "Support extended precision"
  1305. depends on FPE_NWFPE
  1306. help
  1307. Say Y to include 80-bit support in the kernel floating-point
  1308. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1309. Note that gcc does not generate 80-bit operations by default,
  1310. so in most cases this option only enlarges the size of the
  1311. floating point emulator without any good reason.
  1312. You almost surely want to say N here.
  1313. config FPE_FASTFPE
  1314. bool "FastFPE math emulation (EXPERIMENTAL)"
  1315. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  1316. ---help---
  1317. Say Y here to include the FAST floating point emulator in the kernel.
  1318. This is an experimental much faster emulator which now also has full
  1319. precision for the mantissa. It does not support any exceptions.
  1320. It is very simple, and approximately 3-6 times faster than NWFPE.
  1321. It should be sufficient for most programs. It may be not suitable
  1322. for scientific calculations, but you have to check this for yourself.
  1323. If you do not feel you need a faster FP emulation you should better
  1324. choose NWFPE.
  1325. config VFP
  1326. bool "VFP-format floating point maths"
  1327. depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1328. help
  1329. Say Y to include VFP support code in the kernel. This is needed
  1330. if your hardware includes a VFP unit.
  1331. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1332. release notes and additional status information.
  1333. Say N if your target does not have VFP hardware.
  1334. config VFPv3
  1335. bool
  1336. depends on VFP
  1337. default y if CPU_V7
  1338. config NEON
  1339. bool "Advanced SIMD (NEON) Extension support"
  1340. depends on VFPv3 && CPU_V7
  1341. help
  1342. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1343. Extension.
  1344. endmenu
  1345. menu "Userspace binary formats"
  1346. source "fs/Kconfig.binfmt"
  1347. config ARTHUR
  1348. tristate "RISC OS personality"
  1349. depends on !AEABI
  1350. help
  1351. Say Y here to include the kernel code necessary if you want to run
  1352. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1353. experimental; if this sounds frightening, say N and sleep in peace.
  1354. You can also say M here to compile this support as a module (which
  1355. will be called arthur).
  1356. endmenu
  1357. menu "Power management options"
  1358. source "kernel/power/Kconfig"
  1359. config ARCH_SUSPEND_POSSIBLE
  1360. def_bool y
  1361. endmenu
  1362. source "net/Kconfig"
  1363. source "drivers/Kconfig"
  1364. source "fs/Kconfig"
  1365. source "arch/arm/Kconfig.debug"
  1366. source "security/Kconfig"
  1367. source "crypto/Kconfig"
  1368. source "lib/Kconfig"